Hi to all, Im trying to use the SPI IP core from the uclinux from petalinux (v0.4).
When the kernel starts it recognizes the SPI device with irq, and get the spi device on /dev/spi0 , but I can´t acces to it from an application.
From the kernel build I chose the Xilinx SPI on Char device and SPI support with bitbang , on device drivers.
The EDK SPI driver is 2.01.b
Some transcripts here.
boot screen:
io scheduler cfq registered (default)
xilinx_spi 0: at 0x8630C000 mapped to 0x8630C000, irq=5
xilinx_spi 1: at 0x88208000 mapped to 0x88208000, irq=6
From command line:
# cat /proc/devices
Character devices:
1 mem
2 pty
3 ttyp
5 /dev/tty
5 /dev/console
5 /dev/ptmx
10 misc
89 i2c
90 mtd
123 xilinx_spi
128 ptm
136 pts
204 ttyUL
# ls -l /dev/spi
/dev/spi0 /dev/spi1
# ls -l /dev/spi*
crw-r--r-- 1 root 0 123, 0 Jan 1 00:00 /dev/spi0
crw-r--r-- 1 root 0 123, 1 Jan 1 00:00 /dev/spi1
I has been trying with several examples with no succes I only manage to open the device.
# ./spi_1 -D /dev/spi0
can't set spi mode: Inappropriate ioctl for device
Abort
Part of the program.
( I added spidev manually)
..............................
#include <linux/spi/spidev.h>
...................................................
fd = open(device, O_RDWR);
if (fd < 0)
printf("can't open device");
ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
if (ret == -1)
printf("can't set spi mode");
................................................
Oh, and the SPI device works OK from a sample code running directly from the microblaze.
Thanks in advance.
